Sasaki Y, Ueno T, Taniguchi H, Ohyama T
Department of Maxillo-Facial Prosthetics, Graduate School, Tokyo Medical and Dental University, Japan.
J Med Dent Sci. 1998 Mar;45(1):29-37.
To investigate the effect of voluntary teeth clenching on the isometric and isokinetic exercises of the lower limbs, the association of muscle strength (peak torque, PT) and muscle activities (integrated electromyographic activity per unit of time, iEMG/s) of the three muscles of the triceps surae with teeth clenching during isometric and isokinetic plantar flexion were simultaneously measured for 12 healthy male volunteers using a Cybex 6000 Extremity Testing and Rehabilitation System and a surface EMG analyzing system. The statistical analysis demonstrated that for the isometric exercise, PT and each iEMG/s significantly increased in association with teeth clenching, and a positive correlation existed between the biting force and each variable. In contrast, no association was found with teeth clenching for the isokinetic exercise. In this study, therefore, it was found that the effect of teeth clenching differed between the isometric and isokinetic exercises.
为了研究自愿紧咬牙对下肢等长和等速运动的影响，使用Cybex 6000肢体测试与康复系统和表面肌电图分析系统，对12名健康男性志愿者在等长和等速跖屈过程中，比目鱼肌三块肌肉的肌肉力量（峰值扭矩，PT）和肌肉活动（每单位时间的积分肌电活动，iEMG/s）与紧咬牙的相关性进行了同步测量。统计分析表明，对于等长运动，PT和每个iEMG/s随着紧咬牙而显著增加，咬合力与每个变量之间存在正相关。相比之下，等速运动中未发现与紧咬牙有关联。因此，在本研究中发现，紧咬牙在等长和等速运动中的影响有所不同。
